色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

"In mathematics, you don't understand things. You just get used to them."

Politics and literature are both attempts to change reality, just in different ways.

Monetary policy is 98% talk and 2% action.

In mining, safety isn't just policy - it's personal.

【譯文】溺愛母親會養(yǎng)出敗家子，嚴格管教不會出兇暴奴仆。